I purchased one for use with the FZ1000. I wanted something that showed battery level to reduce the risk of the camera suddenly shutting down and corrupting the memory card.

Battery level works! The bar graph shows a decrease or will flash red when it's getting low. Another time, I started up the camera and it indicated power was low and shut itself off.

In terms of lifetime, the Kastar held up for 400+ JPEG+RAW shots on the FZ1000 over a two hour shoot.

I'm happy so far! I'm using it as my primary battery and will report if anything changes.

Screaming deal, especially if you need a bunch for video!

These batteries seem to be doing what they're supposed to do. I've started using and rotating these out with my solo lumix g7 battery that came with my camera. Looks like the Kastar will last around 30min shooting in 4K in 60fps continuously so you will all have to base your judgments around that figure with my review.

When I received these, one of the batteries had some juice in it while the other needed to be charged just to let you all know. I will still be monitoring these batteries and will update my review if necessary. Other than that, there isnt much else to say, they are batteries :)

Oh by the way, the presentation card in the box was kind of thoughtful. The company is open to any feedback or concerns you may have. If my review was helpful let me know, and ask if you have any questions about anything.

The headline pretty much sums up my thoughts on this. On the Panasonic FZ-1000, the battery level showed and they appear to be fully coded. They seem to take a little longer to charge and last almost as long as the Panasonic brand batteries which are far more expensive. The batteries also don't fit into the accompanying charger as snugly as the brand name battery and charger. That said, everything works fine. Any photographer or videographer even the slightest bit serious about their craft should invest in a few batteries. I've been shooting with these in the field for six months with no issues so far. The Pros far outweigh any Cons. I would easily buy them again at the same price.

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